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Lette-rs Patent No. 94,462, dated August 31, 1869.

The Schedule referred to in these Letters Patent and making part of thesam'e.

To all whom it may concern.-

Be it known that I, WILLIAM H. COWL, of Brooklyn, in the county ofKings, and State of' New York, have invented a new and improvedVentilator for Windows; and I do hereby declare that the following is afull, clear, and exact description thereof', which will enable thoseskilled in the art to make and use the same,1'eference being had to theaccompanying drawings, forming part of this specification.

- `Figure 1 is au inside view ot' a portion of a window, to which myimproved ventilator has been attached.

Figure 2 is a detail sectional View of the taken through the line xx,fig. 1.

Similar letters of reference indicate corresponding parts.

My invention has for its object to furnish an improved ventilator forthe windows of buildings, railroad-cars, steamboats, die., which shallbe so constructed as not to exclude the light while allowing the fresh'air to pass in freely, butin suoli a way as not to cause any unpleasantor injurious'draughts; and

It consists in the construction and combination of the various partsofthe ventilator, as hereinafter more fully described.

A represents the sash of a window, in the ra-bbet of which, in which theglass pane is usually secured, is placed the vertical partoi themetallic i'ame B, which is secured in place 'by screws, screwing intothe sash A.

lhe outer part of the ii'aine B inclines downward and outward, so as toleave an opening in the lower part of the iiame B, from four to eightinches wide, according to -the size of the said frame. V

In the front, and in the triangular side openings of same,

the frame B, are fitted and secured panes of glass, C,

so as to allow the light to pass through freely.

In the opening in the bottom of the frame B are detachably secured twonely-perforated plates, D

and E, one of which, D, is stationar'yg'and the other, E, slides uponit, so that by adjusting the position of the sliding plate E, thepeiforations may be partially or wholly closed, to regulate theadmission of air, as desired.

In the case of windows provided with outside blinds or shutters, theposition of the ventilator may be reversed; that is to say, the inclinedpart of the ventilator may project inward and upward, the perforatedplates being at the top of said ventilator.

But in the case of windows provided ,with inside vblinds or shutters,the inclined part of the frame vplate D, and sliding perforated plate E,with each other, said parts being constructed and connected with thewindow-sash, substantially as herein shown and described, and for thepurpose set forth.

2. Projecting one end of a glass window-pane out- Ward or inward fromthe plane of the sash, for the purpose of obtaining an upward draught,substantially as herein shown and described.

The'above specication of my invention signed by me, this 5th day ofAugust, 1869.

WM. H. COWL.

Witnesses:

GEO. W. Manne, JAMES T. GRAHAM.

